THE RIO CASTLE The Rio Castle,
also known as Kastelli of Patra, is
located near the Rio-Antirrio bridge.
It was constructed in 1499 by sultan
Bayezid ΙΙ on the remnants of the
ancient temple of Poseidon on the
side of Rio. Along with the castle of
Antirrio across it, they used to control
the sea pass. In time, the castle was
occupied by conquerors who left
their indelible mark to its building
style. On the one side, the castle
has a wide trench with sea water as
it is connected with the sea. In the
trench there are two bastions on the
outside connected with the main
castle through stone bridges, while it
has two gates. The castle is open to
visitors and it hosts cultural events.